Concentration distributions of air contaminants and meteorological variables in New Jersey and New York for workdays (Mondays through Fridays, omitting holidays) and Sundays are compared by means of quantile-quantile plots. The ozone distributions are slightly higher on Sundays, and the primary pollutant distributions are lower. These results raise serious questions about the validity of current concepts underlying ozone reduction in urban atmospheres.

Self-assessment examinations were administered to job applicants for 13 different occupational classes These examinations were composed of lists of tasks that were either job-related as determined by a job analysis or bogus but superficially resembling the job-related tasks Applicants were asked to rate the extent of their training and experience on each task Analysis of these ratings revealed that inflation bias was prevalent and pervasive. A subsequent test of five clerical classes demonstrated that inflation bias was negatively associated with an external performance measure. Two solutions for correcting for inflation bias were examined. Both were demonstrated to be sound procedures for reducing inflation bias and have the potential for enhancing test validity.Requests for reprints should be sent to the Selection Center,

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